ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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41.17 Multi-media Storage(MMS)
Displaying 1-6 of 6 articles from this issue
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  • Multi-media Storage(MMS)
    Pages Cover1-
    Published: 2017
    Released on J-STAGE: July 21, 2021
    DOIhttps://doi.org/10.11485/itetr.41.17.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Contents
    Pages Cover2-
    Published: 2017
    Released on J-STAGE: July 21, 2021
    DOIhttps://doi.org/10.11485/itetr.41.17.0_Cover2
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Real Time Observation of Current Driven Magnetic Domains in Magnetic Nanowire Memory by Magneto-Optical Microscopy
    Mitsunobu OKUDA, Mayumi KAWANA, Yasuyoshi MIYAMOTO
    Session ID: MMS2017-45
    Published: 2017
    Released on J-STAGE: July 21, 2021
    DOIhttps://doi.org/10.11485/itetr.41.17.0_11
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have proposed a new magnetic recording memory utilizing parallel aligned nanowires without mechanical moving parts, in order to achieve ultra-high data transfer rate for the requirements of future 8K ultra-high definition videos and three dimensional videos. An experimental magnetic nanowire memory element is constructed by fixing a magnetic recording head, in which a couple of writer and reader were embedded, onto a fabricated magnetic nanowire. We have succeeded in demonstrating the operational principle of the magnetic nanowire memory in this virtual nanowire memory. To increase the velocity of magnetic domains, we adopted magnetic nanowires with low magnetization materials. We succeeded in observing current-driven domains in nanowire by magneto-optical microscopy.
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  • Preparation of perpendicular MTJ structure using half metallic full Heusler alloy Co2FeS films
    Koki SHINOHARA, Yota TAKAMURA, Shigeki NAKAGAWA
    Session ID: MMS2017-46
    Published: 2017
    Released on J-STAGE: July 21, 2021
    DOIhttps://doi.org/10.11485/itetr.41.17.0_35
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We attempted to add perpendicular magnetic anisotropy (PMA) to half-metallic full-Heusler Co2FeSi (CFS) alloy thin films with potential application in magnetic tunnel junction (MTJ). CFS/MgO stacked structure showed PMA by setting the thickness of CFS below 0.7 nm. It is confirmed PMA is originated from CFS/MgO interfaces. Furthermore, we found that more stable PMA was obtained by introducing oxygen exposure process after the deposition of CFS layer before the preparation of MgO layer. An elongation toward normal direction of CFS lattice is also useful to induce PMA. Contact with Pd(111) crystal plane for CFS upper layer is also effective to induce OMA especially for upper layer. These processes are very useful as methods to modify the structure and chemical state at the interface and effective to form p-MTJ using CFS layers with both half-metallic ferromagnetism and PMA.
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  • Speeding up micromagnetic simulation and application to spin torque devices
    Tadashi ATAKA, Atsushi FURUYA, Tomohiro TANAKA, Chikako YOSHIDA, Koich ...
    Session ID: MMS2017-47
    Published: 2017
    Released on J-STAGE: July 21, 2021
    DOIhttps://doi.org/10.11485/itetr.41.17.0_71
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In recent years, saving the energy of the electronic devices has been needed , because of the interest in the environmental problem. To develop the devices driven by the spin transfer torque, e.g. microwave assisted magnetic recording or STT-MRAM, analyzing the detailed magnetization dynamics is required. Because micromagnetic simulation can treat the magnetic material in nanometer resolution, this technique is effective to analyze these devices. However, the technique needs to long computation time. Reducing the computational costs remains challenging problem. In this report, we explain the speeding up of the micromagnetic simulation and examples for which the speeding up method is applied.
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  • Multi-media Storage(MMS)
    Pages 76-
    Published: 2017
    Released on J-STAGE: July 21, 2021
    DOIhttps://doi.org/10.11485/itetr.41.17.0_76
    CONFERENCE PROCEEDINGS FREE ACCESS
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